mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Kai Heng Feng
89d5c4eb81
commit8feaec33b9upstream. USB controller ASM1042 stops working after commitde3ef1eb1c(PM / core: Drop run_wake flag from struct dev_pm_info). The device in question is not power managed by platform firmware, furthermore, it only supports PME# from D3cold: Capabilities: [78] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0-,D1-,D2-,D3hot-,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Before commitde3ef1eb1c, the device never gets runtime suspended. After that commit, the device gets runtime suspended to D3hot, which can not generate any PME#. usb_hcd_pci_probe() unconditionally calls device_wakeup_enable(), hence device_can_wakeup() in pci_dev_run_wake() always returns true. So pci_dev_run_wake() needs to check PME wakeup capability as its first condition. In addition, change wakeup flag passed to pci_target_state() from false to true, because we want to find the deepest state different from D3cold that the device can still generate PME#. In this case, it's D0 for the device in question. Fixes:de3ef1eb1c(PM / core: Drop run_wake flag from struct dev_pm_info) Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Cc: 4.13+ <stable@vger.kernel.org> # 4.13+ Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.